Falcon Inc. Double Points Hop Up Bucking for Airsoft AEG Rifle (Model: 55 / Green)

"An interesting product. The material is slightly different from other rubbers on the market but it still seems decent in quality. In my fitment testing, I fitted this to many different hop units and tested it on half a dozen guns and ended up with the conclusion that this specific rubber was designed for older G&G hop units. To compare, I took the standard green G&G hop rubber (ID: 36022) and did a size comparison as well as nozzle fitment and to my surprise, they had the same lip profile and dimensions. Because of this, this rubber makes a great drop-in for a G&G rifle. Because of this, however, you're going to have to make sure that your air nozzle is 21.40mm in length. The G&G hop rubbers have a slightly shorter lip length and to compensate for this, G&G made their nozzles slightly longer (about 0.15mm in length). While this may lead to negligible air loss in G&G setups, I've had other setups where there were significant FPS drops from air seal issues on the rubber. If you want a good upgrade to pair with this part for a G&G, Rocket makes a good o-ring nozzle that is 21.40mm in length and similar in nozzle profile (ID: 12504). The MAXX air nozzles will also fit nicely just make sure you get one with the correct length.
As for the performance, It performs ok. The inside of the rubber has a fishbone-like spacer similar to the hop-up nubs you would buy for mad bull rubbers. Compared to the G&G green rubber, it will apply slightly more hop effect increasing the range slightly. You'll see a slight decrease in FPS but that's typical for rubbers that apply more force. Overall, a decent upgrade for G&G rifles. I would say there are better upgrades for the price but if you want something different and a direct drop-in for G&G, then this will work.